ISO 6684:1982
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Butadiene for industrial use Determination of tert-butyl-catechol (TBC) (4- (1,1-dimethyl- ethyl)-1,2 benzenediol) Spectrometric method
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04-03-2019
English, French
01-07-1982
TBC is added as an oxidation inhibitor to 1,3-butadiene for industrial use. For the determination the inhibitor is separated from the butadiene by evaporation. The residue is dissolved in water and an excess of iron(III) chloride is added. The spectrometric measurement of the absorbance of the yellow-coloured complex is carried out at a wavelength of about 425 nm. The method is applicable to butadiene containing more than 50 mg TBC per kilogram.
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